May 22, 2026

Senior Frontend Engineer - React (Remote)

Senior • Remote

5,000 - 6,500 EUR

Copenhagen, Denmark

At ChurchDesk, our mission is to help churches modernize and stay connected with their communities in a rapidly changing world. As a SaaS company, we provide digital tools that enable churches to streamline operations, communicate effectively, and engage their congregations. Over the past 15 years, we’ve grown from a startup into an international business, yet we remain a small, collaborative team where your impact will be visible from day one. We value diversity, inclusivity, and the unique perspectives each person brings to our mission.

About your new role

As a Senior Frontend Engineer, you will:

  • Take lead and ownership of the frontend on the projects you manage, while contributing in a senior capacity on projects led by others.

  • Work hands-on to deliver high-quality, maintainable, and scalable user interfaces.

  • Collaborate closely with our product team, designers, and other engineers to shape product features.

  • Support teammates by sharing knowledge, best practices, and architectural guidance.

  • Embrace AI-augmented workflows to accelerate boilerplate generation, enabling focus on high-level state management and complex UI logic.

  • Build and maintain prompt libraries and custom AI instructions to keep frontend architecture consistent and accessible.

  • Apply senior-level judgment to balance rapid prototyping with long-term maintainability and scalability.

Skills & Requirements

We are looking for someone who:

  • Has 5+ years of frontend development experience with a track record of delivering successful projects end-to-end.

  • Has deep expertise in React, TypeScript, and TanStack Query, and modern frontend tooling.

  • Understands modern frontend engineering practices including state management, component design, performance optimization, and testing.

  • Demonstrates excellent written and verbal communication in English, collaborating effectively with product team and engineers to shape and refine product features.

  • Has experience working remotely and is based in the EU, with legal authorization to work.

Nice-to-Have

  • Familiarity with NoSQL datastores such as ElasticSearch, Redis, or MongoDB.

  • Familiarity with React Native, as our mobile apps and in-person donation terminals are built using it.

  • Experience with AI-assisted development workflows, such as prompt engineering or code generation tools.

What We Offer

  • The opportunity to make a real impact on a product used by some of the largest and oldest institutions in the world.

  • A supportive, low-ceremony, and lean-process environment where your ideas and contributions are valued.

  • Permanent contract with 6 weeks of paid vacation plus local public holidays to support work-life balance.

  • Enjoy the opportunity to collaborate in person and work from our Berlin and Copenhagen offices.

  • A social, collaborative culture with annual kick-offs, team trips, and friendly challenges.

  • Growth opportunities to develop your skills and career in a fast-moving, international team.

About ChurchDesk

At ChurchDesk, we believe that the church plays an important role in society. Our platform is used by thousands of congregations to organise their work, improve communication with members, reach more people, and unlock new ways of fundraising.
Our customers are part of one of the largest and oldest institutions in the world: the Church. It is undergoing significant change to prepare for the future — and we are here to support that transformation. For churches across Europe, it is crucial to work more efficiently and stay connected to their members and communities.

ChurchDesk has been around for more than 10 years — evolving from a startup into an international company serving customers across Europe. And we’re just getting started!

We actively live our values in our daily work:

#challenge: We challenge ourselves — and our customers — to continuously improve. We work like a professional sports team: with ambition, discipline, and strong team spirit.

#dogoodbusiness: Doing good business is a marathon, not a sprint. It requires endurance, quality, and integrity — every single day.

#jointheride: The journey matters just as much as the destination. Be part of it, celebrate successes — and have fun! We value being together, especially in the office.

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ADA Specifications - Reasonable accommodations may be made to enable individuals with disabilities to perform the essential functions of this position.

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Warsaw, Poland

100 - 130 USD

🏢 Summary: Senior Frontend Engineer role focused on building and evolving scalable, maintainable web applications using React. The position involves leading development of user-facing features, ensuring performance and accessibility, and shaping the frontend architecture. You will own features end-to-end and collaborate closely with product and design to deliver high-quality solutions. 🗂️ Requirements: Commercial experience with React, Experience building complex frontend features, Ability to work independently on frontend tasks, Experience collaborating with product and design stakeholders, Strong focus on code quality and maintainability, Experience optimizing performance and accessibility 📃 Skills: React, JavaScript, TypeScript, HTML, CSS, Testing, Accessibility, Performance, Git, DesignSystems 🏢 Description: We are hiring a Senior Frontend Engineer to join a product-focused team working on modern web applications for our client. In this role, you’ll take the lead in building user-facing features that are reliable, scalable, and easy to maintain. You’ll work at the intersection of engineering, product, and design — turning ideas into real, high-quality solutions used by end users. This is a position for someone who is comfortable making decisions, taking responsibility for their work, and actively shaping the frontend layer of the product. Your day-to-day Build and evolve frontend features with a focus on scalability and long-term maintainability Turn product concepts and design mockups into functional, high-quality interfaces Work closely with product and design stakeholders to refine solutions and improve user experience Take care of application performance, accessibility, and overall code health Influence technical direction within the frontend domain Spot inefficiencies and improve existing solutions and codebase structure Own your work end-to-end — from idea to production. What we’re looking for Solid commercial experience in frontend development with React Confidence in delivering complex features without close supervision Experience collaborating with non-engineering stakeholders (e.g. product, design) Strong focus on code quality, readability, and long-term maintainability Ownership mindset — you don’t just implement tasks, you drive solutions. Nice to have Experience working on complex or large-scale web platforms Exposure to shared frontend ecosystems or multi-team environments Familiarity with component-driven development and design systems Interest in growing your skills in TypeScript and modern frontend testing practices

Technology

AgileEngine

Frontend Engineer

Senior

Remote

Krakow, Poland

5,599 - 7,410 USD

🏢 Summary: Senior Frontend Engineer role focused on building and maintaining guest-facing web experiences for a global QSR platform, including ordering, checkout, payments, and loyalty features. The position involves developing scalable React and Next.js applications with TypeScript, integrating headless AEM content and backend APIs, and ensuring high performance, accessibility, and SEO standards. You will collaborate in an Agile team with peer code reviews and automated testing across the full development lifecycle. 🗂️ Requirements: 4+ years of professional software engineering experience, Strong commercial experience with React and TypeScript, Hands-on experience with Next.js and server-side rendering, Proficiency with CSS Modules or Tailwind, Deep understanding of React fundamentals (hooks, context, lifecycle, performance), Experience with Redux Toolkit or equivalent state management, Experience with React Query or similar server-state management, Experience integrating RESTful APIs and token-based authentication, Experience with frontend testing (unit, component, accessibility), Familiarity with CI/CD pipelines (GitHub Actions, Azure DevOps, or equivalent), Strong understanding of SEO and Core Web Vitals optimization, Upper-intermediate English level 📃 Skills: TypeScript, React, Next.js, JavaScript, CSS, Tailwind, Redux, ReactQuery, REST, CI/CD, GitHubActions, AzureDevOps, AEM, GraphQL, Sentry 🏢 Description: ID72472 AgileEngine is an Inc. 5000 company that creates award-winning software for Fortune 500 brands and trailblazing startups across 17+ industries. We rank among the leaders in areas like application development and AI/ML, and our people-first culture has earned us multiple Best Place to Work awards. Why join us If you're looking for a place to grow, make an impact, and work with people who care, we'd love to meet you! :) About the role We are looking for a Senior Frontend Engineer to build and maintain guest-facing web experiences for a global QSR platform, working across restaurant locator, menu browsing, online ordering, cart, checkout, payments, and loyalty. You will write clean TypeScript using React and Next.js App Router, implement AEM headless content, integrate backend ordering and authentication APIs, and maintain automated tests with attention to Core Web Vitals and accessibility standards. The role follows collaborative Agile practices with peer code review on every pull request. What you will do Build and maintain features across the full guest web experience, including restaurant locator, menu browsing, online ordering, cart, checkout, payments, and loyalty; Write clean, well-tested TypeScript following established coding standards with automated checks running on every commit; Implement AEM-delivered content and components using a headless architecture; Connect the site to backend services and third-party tools, including ordering APIs, authentication, payment processors, feature flags, and analytics; Work with product managers, designers, and backend engineers to turn requirements into working software; Participate in sprint planning and reviews; Implement solutions based on Figma designs; Align on API contracts; Review code from teammates; Incorporate review feedback into your own pull requests; Debug and fix issues across browsers using crash reporting tools, network traces, and performance profiling; Write and maintain unit, component, and integration tests with attention to accessibility and Core Web Vitals budgets; Help keep build and release pipelines healthy, including automated builds, preview deployments, and production releases; Participate in Agile ceremonies, including standups, sprint planning, refinement, and retrospectives; Stay current with the React and Next.js ecosystem and contribute to team-wide improvements, including performance and architecture initiatives. Must haves 4+ years of professional software engineering experience ; Strong commercial experience building production web applications with React and TypeScript ; Experience with CSS Modules or Tailwind ; Deep understanding of React fundamentals, including hooks, context, component lifecycle, and performance patterns; Hands-on experience with Next.js (App Router preferred) and server-side rendering patterns; Solid grasp of state management using Redux Toolkit or equivalent and server-state patterns using React Query or similar; Experience integrating RESTful APIs and token-based authentication flows; Practical experience with frontend testing, including unit tests, component tests, and accessibility checks; Familiarity with DevOps practices and CI/CD pipelines using GitHub Actions , Azure DevOps , or equivalent; Strong understanding of SEO, Core Web Vitals, and performance optimization techniques; Clear communicator who works well in a collaborative, cross-functional team; Upper-intermediate English level. Nice to haves Adobe Experience Manager (AEM) headless content delivery; Feature flag systems (e.g., LaunchDarkly); Web analytics or error tracking (Sentry, Adobe Experience Platform, Quantum Metric); GraphQL ; Accessibility (WCAG 2.1 AA) and internationalization (i18n) experience; Privacy and consent frameworks (e.g., OneTrust); Experience mentoring junior developers and leading code reviews. The benefits of joining us Professional growth: Accelerate your professional journey with mentorship, TechTalks, and personalized growth roadmaps Competitive compensation: We match your ever-growing skills, talent, and contributions with competitive USD-based compensation and budgets for education, fitness, and team activities A selection of exciting projects: Join projects with modern solutions development and top-tier clients that include Fortune 500 enterprises and leading product brands Flextime: Tailor your schedule for an optimal work-life balance, by having the options of working from home and going to the office – whatever makes you the happiest and most productive. Meet Our Recruitment Process Asynchronous stage – An automated, self-paced track that helps us move faster and give you quicker feedback: Short online form to confirm basic requirements 30–60 minute skills assessment via Codility – a platform founded in Poland that helps us provide quicker feedback and streamline this stage of the process. 5-minute introduction video Synchronous stage – Live interviews Technical interview with our engineering team (scheduled at your convenience) Final interview with your future teammates If it’s a match — you’ll get an offer!

Technology

Optiveum

Senior Frontend Engineer (React)

Senior

Hybrid

Warsaw, Poland

5,000 - 7,000 EUR/mo

🏢 Summary: Senior Frontend Engineer role focused on leading development of a high-traffic web application for shipping management and rate comparison. The position involves end-to-end frontend ownership, from translating designs into production-ready interfaces to optimizing performance and accessibility. You will shape architecture decisions and maintain standards within a React/TypeScript monorepo environment. 🗂️ Requirements: 8+ years of production frontend development experience, 3+ years in senior role within scale-up or start-up environment, Deep expertise in React and TypeScript, Strong knowledge of state management and component architecture, Proficiency in HTML semantics and modern CSS, Experience with web performance optimization and Core Web Vitals, Practical expertise in WCAG 2.2 AA accessibility standards, Experience with unit, integration, and end-to-end testing, Experience working with monorepos, Ability to contribute to frontend and API architecture decisions 📃 Skills: React, TypeScript, JavaScript, HTML, CSS, Grid, Flexbox, WCAG, CoreWebVitals, Testing, Monorepo, API, AWS, Snowflake, Figma 🏢 Description: Senior Frontend Engineer Our Client is an ambitious tech company on a mission to create a frictionless shipping experience for SMEs. They wrap real-time pricing, comparison, booking, and tracking into a clean and unified interface, replacing outdated logistics processes with a seamless digital platform. Role We are looking for an experienced Senior Frontend Engineer to play a central role in shaping a web app where thousands of customers every week sign up, compare rates, manage integrations, and book shipments. You will work end-to-end—from understanding customer problems to shipping production code—while leading frontend work on a core value team (Customer Experience, Marketplace, or SaaS). Responsibilities Plan and lead frontend development within your value team, collaborating closely with PMs, designers, and backend engineers. Translate designs into production user interfaces that are accessible, performant, well-tested, and consistent with the rest of the product. Build prototypes to put working code in front of customers when validating product ideas. Own web performance on the surfaces you touch, ensuring excellent Core Web Vitals to boost conversion rates. Champion accessibility across the platform (WCAG 2.2 AA is the baseline). Contribute to architecture decisions that cross the frontend/backend line, including API boundaries and real-time updates. Maintain shared standards across a React/TypeScript monorepo through code reviews and technical councils. Mentor junior engineers and contribute to the evolution of the company's design system. Key competences 8+ years of experience writing production frontend code, with the last 3+ at a senior level in a scale-up/start-up environment. Deep React and TypeScript experience, with strong opinions on state management and component architecture. Solid web fundamentals: HTML semantics, modern CSS (Grid, Flexbox, container queries), browser rendering pipelines, and the network layer. Accessibility expertise as a practitioner skill, capable of spotting WCAG issues during design reviews. Fluency in web performance, measuring and optimizing Core Web Vitals on real products. High testing maturity (unit, integration, and end-to-end tests). Excellent written and spoken English communication skills. Bonus points for: Experience with large-scale monorepos, background in logistics/marketplaces/B2B SaaS, contributing to design systems, embedding AI-assisted features, or a working knowledge of Go. Salary and Conditions Salary up to 7000 Euro per month 100% remote from Poland B2B contract signed directly with our Client Start ASAP Benefits Work with a modern tech stack (React, TypeScript, AWS, Snowflake, Figma, Claude Code, etc.) A curious, collaborative, low-ego culture within a Great Place to Work certified environment